I have been very happy with the trispark and, in fact, it was the first e-ignition that I thought could actually provide equal or better performance to the oem points. There was an analog Boyer on the bike when I bought it and did not like anything about it - advance curve, power consumption, kickback at kickstart, etc, so I removed it and put points/AAU back in. I was extremely pleased with the stock points setup and kept it there for 4 years, just installing the Trispark last year.
OTOH, I have to admit I do worry about the fact that all the trispark components are contained within the unit that mounts under the point cover. It makes for a really elegant setup but the temperature in the point cover gives me a bit of concern though I have had no indication that it is a problem at all.
Frankly, although an e-ignition requires no periodic maintenance, I wouldn't hesitate to go back to the points if the Trispark caused any problems over the long run. Considering the fact that there is a good bit of routine maint with these bikes, the little bit of time it takes to check/adjust points and lube the AAU is not much of an issue as far as I am concerned. So if the Trispark ever craps out, I'll go back to points and forget about e-ignition.